power booster problems

[WILSON PATCHELL]

I put a new master cylinder (napa ) on my 1991 diesel w250 and it worked fine for a while but now my brake pedal goes to the floor if the truck sits for a few days . The master cylinder is full of fluid and not leaking . I heard there was a kit from a 1996 model for the power booster that can be installed on my power booster. Has anybody heard of this problem and where can i get the kit to fix it ????

 

[NIsaacs]

If the pedal goes to the floor the master cylinder is bad or has air in it. The booster is not the problem.



Nick

 

[RSchwarzli]

Agreed. There is most an issue with it.

 

[RSchwarzli]

And congrats on your first post by the way! Oo.

 

[DVolk]

If you listen closely If your booster is bad you can here air escapeing from it my guess its a bad one the diaphram in it went bad

 

[mysteryman]

This is a common problem with rebuilt boosters. . I explained it a few weeks back in one of my other posts.

I have all the parts and some custom made rings that I make that allow the booster to be bolted back together instead of crimping it. I am currently making a video on how to rebuild your booster. Stay tuned for more or call me on the phone for further questions.

I put a new master cylinder (napa ) on my 1991 diesel w250 and it worked fine for a while but now my brake pedal goes to the floor if the truck sits for a few days . The master cylinder is full of fluid and not leaking . I heard there was a kit from a 1996 model for the power booster that can be installed on my power booster. Has anybody heard of this problem and where can i get the kit to fix it ????

 

[Ncostello]

If you listen closely If your booster is bad you can here air escapeing from it my guess its a bad one the diaphram in it went bad

Wouldn't the sound be air trying to get inside the booster since it's under a vacuum inside? Not trying to be a smarty... just askin.

 

[DVolk]

Id say escaping since its suppose tobe pulling a vaccumme but could be entering , but reguardless if you here a hiss or air its bad